2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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34 static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/6/93";
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
40 #include <sys/types.h>
50 FU *endfu; /* format at end-of-data */
53 addfile(const char *name)
60 if ((fp = fopen(name, "r")) == NULL)
62 while (fgets(buf, sizeof(buf), fp)) {
63 if (!(p = strchr(buf, '\n'))) {
64 warnx("line too long");
65 while ((ch = getchar()) != '\n' && ch != EOF);
69 for (p = buf; *p && isspace(*p); ++p);
80 unsigned const char *p, *savep;
85 /* start new linked list of format units */
86 if ((tfs = calloc(1, sizeof(FS))) == NULL)
92 nextfs = &tfs->nextfs;
93 nextfu = &tfs->nextfu;
95 /* take the format string and break it up into format units */
97 /* skip leading white space */
98 for (; isspace(*p); ++p);
102 /* allocate a new format unit and link it in */
103 if ((tfu = calloc(1, sizeof(FU))) == NULL)
106 nextfu = &tfu->nextfu;
109 /* if leading digit, repetition count */
111 for (savep = p; isdigit(*p); ++p);
112 if (!isspace(*p) && *p != '/')
114 /* may overwrite either white space or slash */
115 tfu->reps = atoi(savep);
116 tfu->flags = F_SETREP;
117 /* skip trailing white space */
118 for (++p; isspace(*p); ++p);
121 /* skip slash and trailing white space */
123 while (isspace(*++p));
127 for (savep = p; isdigit(*p); ++p);
130 tfu->bcnt = atoi(savep);
131 /* skip trailing white space */
132 for (++p; isspace(*p); ++p);
138 for (savep = ++p; *p != '"';)
141 if (!(tfu->fmt = malloc(p - savep + 1)))
143 (void) strlcpy(tfu->fmt, savep, p - savep + 1);
149 static const char *spec = ".#-+ 0123456789";
159 /* figure out the data block size needed for each format unit */
160 for (cursize = 0, fu = fs->nextfu; fu; fu = fu->nextfu) {
162 cursize += fu->bcnt * fu->reps;
165 for (bcnt = prec = 0, fmt = fu->fmt; *fmt; ++fmt) {
169 * skip any special chars -- save precision in
170 * case it's a %s format.
172 while (strchr(spec + 1, *++fmt));
173 if (*fmt == '.' && isdigit(*++fmt)) {
175 while (isdigit(*++fmt));
181 case 'd': case 'i': case 'o': case 'u':
185 case 'e': case 'E': case 'f': case 'g': case 'G':
193 case 'c': case 'p': case 'u':
199 cursize += bcnt * fu->reps;
207 enum { NOTOKAY, USEBCNT, USEPREC } sokay;
210 unsigned char *p1, *p2, *fmtp;
216 for (fu = fs->nextfu; fu; fu = fu->nextfu) {
218 * Break each format unit into print units; each conversion
219 * character gets its own.
221 nextpr = &fu->nextpr;
222 for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) {
223 if ((pr = calloc(1, sizeof(PR))) == NULL)
227 /* Skip preceding text and up to the next % sign. */
228 for (p1 = fmtp; *p1 && *p1 != '%'; ++p1);
230 /* Only text in the string. */
238 * Get precision for %s -- if have a byte count, don't
243 /* Skip to conversion character. */
244 for (++p1; strchr(spec, *p1); ++p1);
246 /* Skip any special chars, field width. */
247 while (strchr(spec + 1, *++p1));
248 if (*p1 == '.' && isdigit(*++p1)) {
251 while (isdigit(*++p1));
256 p2 = *p1 ? p1 + 1 : p1; /* Set end pointer -- make sure
257 * that it's non-NUL/-NULL first
259 cs[0] = *p1; /* Set conversion string. */
263 * Figure out the byte count for each conversion;
264 * rewrite the format as necessary, set up blank-
265 * padding for end of data.
282 case 'o': case 'u': case 'x': case 'X':
302 case 'e': case 'E': case 'f': case 'g': case 'G':
312 if (fu->bcnt == sizeof(long double)) {
316 pr->bcnt = sizeof(long double);
341 fu->flags |= F_IGNORE;
344 pr->flags = F_ADDRESS;
347 case 'd': case 'o': case'x':
359 /* cs[0] = 'c'; set in conv_c */
367 /* cs[0] = 'c'; set in conv_u */
368 isint2: switch(fu->bcnt) {
388 * Copy to PR format string, set conversion character
389 * pointer, update original.
393 if (asprintf(&pr->fmt, "%s%s", fmtp, cs) == -1)
396 pr->cchar = pr->fmt + (p1 - fmtp);
399 /* Only one conversion character if byte count. */
400 if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++)
401 errx(1, "byte count with multiple conversion characters");
404 * If format unit byte count not specified, figure it out
405 * so can adjust rep count later.
408 for (pr = fu->nextpr; pr; pr = pr->nextpr)
409 fu->bcnt += pr->bcnt;
412 * If the format string interprets any data at all, and it's
413 * not the same as the blocksize, and its last format unit
414 * interprets any data at all, and has no iteration count,
415 * repeat it as necessary.
417 * If, rep count is greater than 1, no trailing whitespace
418 * gets output from the last iteration of the format unit.
420 for (fu = fs->nextfu; fu; fu = fu->nextfu) {
421 if (!fu->nextfu && fs->bcnt < blocksize &&
422 !(fu->flags&F_SETREP) && fu->bcnt)
423 fu->reps += (blocksize - fs->bcnt) / fu->bcnt;
425 for (pr = fu->nextpr;; pr = pr->nextpr)
428 for (p1 = pr->fmt, p2 = NULL; *p1; ++p1)
429 p2 = isspace(*p1) ? p1 : NULL;
435 for (fu = fs->nextfu; fu; fu = fu->nextfu) {
436 (void)printf("fmt:");
437 for (pr = fu->nextpr; pr; pr = pr->nextpr)
438 (void)printf(" {%s}", pr->fmt);
449 /* alphabetic escape sequences have to be done in place */
450 for (p2 = p1;; p1++, p2++) {
493 badcnt(const char *s)
495 errx(1, "%s: bad byte count", s);
501 errx(1, "%%s: requires a precision or a byte count");
505 badfmt(const char *fmt)
507 errx(1, "\"%s\": bad format", fmt);
511 badconv(const char *ch)
513 errx(1, "%%%s: bad conversion character", ch);